Frequency-shift zero-forcing time-varying equalization for doubly selective SIMO channels
EURASIP Journal on Applied Signal Processing
Linearly time-varying channel estimation for MIMO/OFDM systems using superimposed training
IEEE Transactions on Communications
Estimation of basis frequencies for time-varying SIMO channels: a second-order method
IEEE Transactions on Signal Processing
Adaptive blind equalization of time-varying SIMO systems driven by QPSK inputs
Digital Signal Processing
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Joint mitigation of time- and frequency-selective fading is an important and challenging problem in mobile communications. Relying on transmitter-induced redundancy, we propose novel channel estimation and symbol recovery approaches for blind identification and equalization of time- and frequency-selective channels, where the time variation is modeled deterministically by a basis expansion. The resulting statistical algorithm enables the usage of a single antenna, dispenses with channel disparity conditions of existing approaches, and allows channel order overestimation. In addition, new deterministic algorithms for generalized OFDM systems are introduced that produce reliable estimates with few data points at high SNR's. Simulations illustrate the approaches developed